Speed running (trying to complete a videogame in the fastest time possible) is almost as old as gaming itself. At least, it's almost as old as games that have a definite end point or staging points, since speedrunning a game with infinitely repeating levels is Sisyphean.
This collection hosts downloadable movie files documenting the swiftest possible way to complete videogames such as Quake, Metroid, Zelda and many others. The videos come from Speed Demos Archive, TASvideos, and other sources.
Unless specifically noted as an 'emulated' run, all speed runs are done on the original game hardware, using only the normal save points available to a player.